I get the same thing as well. I plug in camera and DK2, and the minute I open the config tool and pick the demo scene, the preview window starts to open, the Rift never lights up, computer freezes, and after a little bit I get the APC_INDEX_MISMATCH error.
Even worse, if I leave the Rift's USB connection plugged in when I turn it on, the computer won't even *BOOT*, and just hangs at a blinking cursor.
I thought it might be the Asmedia USB 3.0 ports on my motherboard, but it also has native USB 3.0 ports direct to the Intel chipset (from mobo headers you connect to case or backplate). Still no dice, same behavior.
I have tried uninstalling and reinstalling the 0.8 runtime, no joy. I previously had the 0.7 runtime installed -- maybe there are bits of it still left around?
My rig:
Windows 8.1, patched up, except for privacy-reducing telemetry updates.
ASUS X99 Deluxe mobo
i7-5930K (NOT overclocked)
32G Corsair RAM (I forget the model, but NOT overclocked!)
2X GTX980, Driver 361.75 (same behavior on previous driver revisions), SLI is turned *OFF*.
USB 3.0 ports from both Asmedia chipset and direct from X99 chipset (same behavior regardless of which I use)
Running the DK2 on the other card, or on the same card as my main display has no difference in behavior.
I know the DK2 works because I have used it on other systems. The configuration tool reports it as connected just like on any other system. When I try to use the demo screen, the lockup/BSOD happens without the Rift's LCD turning on. The preview window opens but hangs partway through the opening, leaving a semi-transparent blank background at the point the computer freezes. The BSOD happens shortly after.
I'm giving up at this point. I wonder if the same thing will happen with the CV1 I preordered. =(
EDIT: To clarify, the Rift's power button functions and the amber LED lights up on it when it is on, and I can turn it on and off. It seems to behave normally until I actually try to send video to it.
